Television – Receiver circuitry – Tuning
Reexamination Certificate
2005-07-05
2005-07-05
Miller, John (Department: 2614)
Television
Receiver circuitry
Tuning
C348S725000, C348S729000, C348S736000
Reexamination Certificate
active
06914639
ABSTRACT:
A combination tuner includes a switching circuit having three transistors which are selectively turned on and off so that one of a television signal received by a first signal receiving unit using an external antenna that is a high sensitivity antenna, an FM signal received by a second signal receiving unit using an internal antenna that is a low sensitivity antenna, and an FM signal received by the first signal receiving unit using the external antenna is selected according to three-mode band data. Therefore, the combination tuner can select an antenna for receiving a desirable FM signal according to the reception field intensity of the target FM signal so that the FM signal can always be reproduced successfully.
REFERENCES:
patent: 6108050 (2000-08-01), Yamamoto et al.
patent: 6243567 (2001-06-01), Saito
patent: 6344881 (2002-02-01), Endo
patent: 6483552 (2002-11-01), Yamamoto
patent: 6683656 (2004-01-01), Kikuchi
patent: 2000-78490 (2000-03-01), None
patent: 2000-217051 (2000-08-01), None
Sasaki Takao
Yamamoto Masaki
Alps Electric Co. ,Ltd.
Miller John
Tran Trang U.
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